import axios from 'axios'
// 1.创建axios的实例
const instance = axios.create({
  baseURL: 'http://localhost:8000',
  timeout: 5000,
  headers: {
    'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8'
  }
})
// 2.axios拦截器
// 请求拦截 instance.interceptors.request.use()
instance.interceptors.request.use(
  config => {
    console.log(config)
    return config
  },
  err => {
    console.log(err)
  }
)

// 响应拦截 instance.interceptors.response.use()
instance.interceptors.response.use(
  res => {
    console.log(res)
    return res
  },
  err => {
    console.log(err)
    if (err && err.response) {
      switch (err.response.status) {
        case 400:
          err.message = '错误请求'
          break
        case 401:
          err.message = '未授权，请重新登录'
          break
        case 403:
          err.message = '拒绝访问'
          break
        case 404:
          err.message = '请求错误,未找到该资源'
          break
        case 405:
          err.message = '请求方法未允许'
          break
        case 408:
          err.message = '请求超时'
          break
        case 500:
          err.message = '服务器端出错'
          break
        case 501:
          err.message = '网络未实现'
          break
        case 502:
          err.message = '网络错误'
          break
        case 503:
          err.message = '服务不可用'
          break
        case 504:
          err.message = '网络超时'
          break
        case 505:
          err.message = 'http版本不支持该请求'
          break
        default:
          err.message = `连接错误${err.response.status}`
      }
    } else {
      err.message = '连接到服务器失败'
    }
    alert(err.message)
    console.log(err)
  }
)

export function request (config) {
  // 2.发送真正的网络请求
  /* return new Promise((resolve, reject) => {
    instance(config)
      .then(res => {
        resolve(res)
      })
      .catch(err => {
        reject(err)
      })
  }) */
  return instance(config)
}
